3e SRD:Frost Brand

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This +3 frost greatsword (+1d6 points of bonus cold damage with each hit) does not shed any light except when the air temperature is below 0F. Its wielder is protected from fire, since the sword absorbs the first 10 points of fire damage each round that the wielder would otherwise suffer.
The frost brand sword also has a 50% chance of extinguishing any fire into which its blade is thrust. This power extends to a 10-foot radius and includes lasting effects and spells but excludes instantaneous effects and spells.